Robert Waite Douglas (15 July 1854 – January 9, 1931), known professionally as R. W. Douglas, was a Canadian librarian, bibliophile, editor, literary agent, author, and public speaker who served as Vancouver, British Columbia's chief librarian from 1911 to 1924 and as the first president of the British Columbia Library Association. Under his direction, the Vancouver Public Library grew greatly in size, its circulation increased and a number of rare books were added to its collection as he worked to make the Vancouver Library one of the "finest libraries on the continent."